<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=633762
-->
<head>
  <title>Test for Bug 633762</title>
  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <script type="text/javascript" src="/tests/SimpleTest/EventUtils.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>

</head>
<body>
<p><a target="_blank" href="https://bugzilla.mozilla.org/show_bug?id=633762">Mozilla Bug 633762</a>

<iframe id="i" src="bug633762_iframe.html#a"></iframe>

<pre id="test">
<script>

var doc;

function runTests() {
  var i = document.getElementById("i");
  doc = i.contentDocument;
  var win = i.contentWindow;
  // set display none on b
  doc.getElementById("b").style.display = "none";
  // flush layout
  doc.documentElement.offsetLeft;
  // click in middle of iframe document to give it focus
  synthesizeMouseAtCenter(i, {}, win);
  win.focus();
  // record scrolltop
  scrollTopBefore = doc.body.scrollTop;
  // send up arrow key event
  sendKey("UP");
  
  window.requestAnimationFrame(finish);
}

function finish() {
  // assert that scroll top is now less than before
  ok(scrollTopBefore > doc.body.scrollTop, "pressing up arrow should scroll up");
  SimpleTest.finish();
}

var smoothScrollPref = "general.smoothScroll";
SimpleTest.waitForExplicitFinish();
SimpleTest.waitForFocus(function() {
  SpecialPowers.pushPrefEnv({"set":[[smoothScrollPref, false]]}, runTests);
});
</script>
</pre>

</body>
</html>
